ARCHIVED REPORTS_XR0008101 CASE 1

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TABLAMMARY OF RESULTS OF GROUNDWATER MONITORING WELL DATE OF CASING DEPTH TO PRODUCT GROUNDWATER TPH-G B T E X MTBE DO LAS - ID SAMPLING/ ELEVATION (a) WATER THICKNESS ELEVATION (b) (uglll) (ug/L) (ug/L) (ug1L) (ug/L) (ug/L) (ppm) MONITORING (Feet) (Feet) (Feet) (Feet) i AMW-4 08/10/90 2536 483 --- 2053 ND<50 06 07 29 42 --- — SUP AMW-4 08/27/90 2536 483 --- 2053 --- -- --- — --- --- AMW-4 11/02/90 2536 489 — 2047 --- — --- — -- — r- AMW-4 11/05190 2536 488 — 2048 ND<50 03 ND<O 3 ND<O 3 ND<0 3 — --- SUP AMW-4 02/25/91 2536 406 --- 2128 ND<50 ND<O 3 ND<O 3 ND<O 3 ND<0 3 — -- SUP AMW-4 06127/91 2536 501 -- 2035 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<O 5 - — CHR AMW-4 09/25/91 2536 545 — 1991 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<O 30 --- — SEQ AMW-4 12/10/91 2536 479 --- 2057 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<0 30 — — SEQ AMW-4 03125/91 2536 426 — 2110 ND<30 ND<O 30 ND<0 30 ND<0 30 ND<0 30 --- — SEQ AMW-4 06/25192 2536 616 --- 1920 ND<30 ND<0 30 ND<0 30 ND<0 30 ND<O 30 — --- SEQ AMW-4 12108192 2536 474 --- 2062 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 — --- ANA AMW-4 03/10/93 2536 428 - 2108 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<O 5 - (I) - PACE AMW-4 06/16/93 2536 406 2130 ND<50 ND<0 5 ND<O 5 ND<0 5 ND<0 5 (I) PACE AMW-4 10/22/93 25 36 415 --- 2011 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<0 5 ND<5 0 (1) --- PACE AMW-4 01/24/94 2536 481 — 2055 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<0 5 ND<5 0 (1) — PACE AMW4 06/07/94 2536 530 — 2006 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<0 5 ND<5 0 (1) 34 PACE AMW-4 09/13/94 2536 559 --- 1977 ND<50 ND<0 5 ND<O 5 ND<O 5 ND<O 5 ND<5 0 (1) 69 PACE AMW-4 01/10/95 2536 422 --- 2114 ND<50 ND<O 5 ND<O 5 ND<O 5 ND<1 — 71 ATI AMW-4 03/23/95 2536 398 --- 2138 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 — 79 ATI AMW-4 10/04/95 2536 532 — 2004 ND<50 ND<O 50 ND<O 50 ND<O 50 ND<1 0 ND<5 0 59 ATI AMW4 01/04196 2536 448 — 2088 ND<50 ND<O 50 ND<0 50 ND<0 50 ND<1 0 ND<5 0 10 ATI AMW-4 03/29/96 2536 432 --- 2104 ND<50 ND<O 5 ND<1 ND<1 ND<1 ND<10 37 SPL i AMW-4 07101/96 2536 488 --- 2048 ND<50 ND<0 5 ND<1 ND<1 ND<1 ND<10 61 SPL AMW-4 10/15/96 2536 509 --- 2027 ND<50 ND<0 5 ND<1 0 ND<1 0 ND<1 0 ND<10 75 SPL AMW-4 04/16/97 2536 367 --- 2169 - - -- -- — --- — �- AMW-4 10115/97 2536 512 — 2024 - AMW-4 03/17/98 2536 471 — 2065 --- — --- — --- '� '"' AMW-4 01/06/99 2536 483 --- 2053 -- — --- — -- — -- — AMW-4 09/13/99 2536 513 --- 2023 --- — — — --- — " AMW-4 01/19/00 2536 455 — 2081 -- - - — - — -- — AMW-4 04/12/00 2536 440 --- 2096 --- �- AMW4 07/22/00 2536 507 — 2029 — -- — - - - "- — AMW-4 10/26/00 2536 468 --- 2068 -- - -- -- — — -" AMW-4 01/17/01 2536 522 — 2014 -- -- AMW4 04/12/01 2536 476 — 2060 — --- -- --- "' -- — AMW-4 05/23/01 2536 485 --- 2051 ND<50 ND<O 5 147 ND<0 5 ND<1 5 ND<O 5 -- PACE AMW-4 07/31/01 2536 511 --- 2025 ND<50 ND<O 5 ND<0 5 ND<O 5 ND<1 5 ND<O 5 --- PACE AMW-4 10/30/01 2536 498 --- 2038 ND<50 ND<0 5 ND<0 5 ND<0 5 ND<1 5 818 --- PACE AMW-4 01/29/02 2536 441 -- 2095 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<1 0 ND<0 5 --- PACE AMW-4 04/30/02 2536 472 — 2064 ND<50 ND<0 5 ND<0 5 ND<O 5 ND<1 0 ND<0 5 -- PACE Blaine Tech Services,Inc,Report,020430-E8-1,BP Oil 11194 at 2375 Tracy Blvd,Tracy,California Page 20